Incandescent-lamp-protecting device



H. F. WAY. INCANDESCENT LAMP PROTECTING DEVICE.

APP'ICATION FILED 9 1,345,466. Patented July 6, 1920.

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HOLROYD FITZWILLIAM WAY, or onneon my, OREGON.

INGANDESCENT-LAMP-PBOTECTING DEVICE.

To all whom it may concern:

Be it known that I, HoLRoYD F. WAY, a citizen of the United States, and a resident of Oregon City, in the county of Clackamas and State of Oregon, have made certainnew and useful Improvements in Incandescent Lamp-Protecting Devices, of which the following is a specification.

My present invention relates generally to incandescent lamp protecting devices, and more particularly to means in connection with incandescent lamps and their sockets to prevent theft or unwarranted removal and reuse ofan incandescent lamp in another socket. 1

More especially my invention has to do with what are known as weather-proof type of incandescent lamp sockets used in factories, and its obj ect is the provision of certain means whereby an incandescent lamp utilized with a socket of this type may be rendered inoperative'for use with the ordi' nary type of socket, or with a weather-proof socket unequipped with my improvements.

In the accompanying drawings illustrating my present invention r Figure '1 is a vertical sectional view illustrating the practical application of my improvements; I

Fig. 2 is a cross section taken substantially on line 2-2"of Fig. 1; Fig. 3 is a detail perspective view of the clamping ring, and, h Fig. 4: is a detail side elevation of the connecting screw of the bulb collar removed.

Referring now to these figures I have shown in Fig.1, a weather-proof'type of lamp socket generally indicated at 10, I in which the threaded base '11 of a bulb 12 is usually directly screwed, and insertible and removable therefrom as freely as with'any other type of lamp socket.

As proposed by my invention, however, an

insulated collar 13 is secured externally ofand around one end of a threaded tube 14, the opposite end of which screws into the threaded lining 15 of the socket 10 until the collar 13 abuts the body of the socket around its open end. The external diameter of this collar 13 is approximately the same as that of the socket 10, as particularly seen in Fig. 1, and its external face has an annular rib, which coincides with the ribs usually to be found around the external open end of a weather proof socket, for the reception of a Specification of Letters Patent.

Application filed me 5, 1919. Serial No. 301,909. r y

I Patented July 6, 1920.

retaining band or ring 16 shown indetail in Fig. 3, and provided ,with flanged; edges 17 .which engage over the ribs of the socket and the collar 13. l I v One end of. the connectingring or band 16 has a transverse slot 18, and the other end has an extending tongue 19 to be passed through the slot and bent back in reverting relation and soldered or'otherwise securedto' the ring or band in order to form a'lock which, after being secured in place, prevents removal of the collar 13 and the threaded tube14. 1 o v That portion of the threaded tube 14 within and adjacent to the collar13 is of such diameter as, to receive a relatively short threaded tube, one end of which is securely fastened within a collar .20 similar. in size and shape to the collar 13, before mentioned, the tube 20 of the collar 21 being in turn of suflicient diameter to "receive the threaded base 11 of a lamp bulb 12 within the same.

As seen in Figi 2, moreover, the tube 21 v has an opening'registeringwith the inner reduced end ofa threaded opening extending tangentially within its collar 20, the'outer end of the opening of which collarcommunr,

cates with a counter-bore 22, and is thus adapted for the reception of a locking screw 23-having a polygonal head 24: at oneend and a tapering threaded engaging portion 25 atits opposite endthe latter of which works through the opening of the tube 21 and is adapted to bite. into the material of thethreaded base 11 of the lamp bulb so as to securely fasten the base of the lamp bulb within the tube 21, and its collar 20, it being noted from Fig. 1 in particular that the opposite-end of'the tube'21projects materially beyondthe free or contact end of the lamp base 11 so as to render the-latter inoperative within the socket of ordinary construction 7 unless equipped with my I improvements.

That end of the first mentioned tube 14 opposite its collar 13, and which is designed to screw within the lining 15 of the socket 10, is'closed at its extremity by an-internal insulated plug 26 supporting an axial electrode or'contact stem 27, the outer end of which is engageable with the, axial contact 28 of the socket 10, and the inner end of which projects to such a point as to be engageable by the axial electrode or contact stem 29 ofthe lamp base 11 when the tube 21 containing the lamp base is screwed within the outer portion of the tube 14, until the collar abuts the collar 13.

7 Thus the axial electrode or contact stem 27 extends to such a point as to enable the lamp base 11 to make proper contact w1th my construction, although if removed from the tube 14 it could not be screwed in the ordinary socket and make contact, while the tube 21 and the collar 20 are connected thereon, V L r In order that'the lamp base 11 may be prevented fromsbeing screwed out of the tube 21, the polygonal head 24 ofthe locking screw 23 which in'the operative position extends-within the counter bore 22,'as shown in Fig. 2,, may be made of various forms so' 7 as to require dllferent characters of socket wrenches for its rotation, and I amithus able to lock the lamp base within its tube in such" manner as to prevent its removal with any pullexcept the one designed for cooperation with its particular locking screw.

In the use of the invention, renewallamps will be provided, each with its tube 21 and collar 20, the former extending beyondthe free end of the lamp base sothat in case of threaded tube into one end'o-f which the lamp base is screwed having a collar around its said end and having 1ts opposite end ex-,

, tending beyond the free end of the lamp base,to prevent'engagement of its contact with the socket contact, meansfor locking the said collar and .thesaidtube in con nection with the lamp base,oand a threaded tube having its inner-send screwed 'into the lamp socket, and having 1ts opposite end projecting therebeyond, said lamp :tub'e'being freely turnableinto and out of the socket tube and said socket carried tube having a central electrode to engage at-its opposite ends,.the spaced contacts of the lamp, socket and the lamp base.

- 2. The combination with a lamp socket, and an incandescent lamp for engagement therein, a threaded tube, to screw within the socket having a socket abutting collar at, its outer end, a central electrode supported in said tube and insulated therefrom, means engaging the socket and said collar for securing said tube within the lamp socket to extend atone end beyond the open end of the socket, a second tube around the lamp base and projecting at one end beyond the freeend of the lam p base, said second tube being freely turnable into and out of the extended end of the first tube, and means for securing said second tube in connection with the lamp base.

3. The combination with' a lamp socket,-

an incandescent lamp toscrew therein, of a pair of relatively engaging threaded tubes freely turnable into and out of one another, means to secure one of sald tubes around the lamp base, to extend beyond the endthereof, whereby to prevent engagement of the lamp and socket contacts, means to s'e-- cure the other of said tubes within and projecting from the lamp socket, and a central electrode supported in insulated relation within'the last mentionedtube and'arrangedi to, extend between the spaced contacts of theilamp socket and base.

4. The combination with a lamp socket,an

incandescent bulb having a threaded base, of

a threaded tube, one end of which receives the base of thelamp bulb'and is provided with a surrounding collar, means in, connection with the collar for securing the same and the said tube to the lamp base, a second threaded tube, one end of which screws within the lamp socket and is provided with an internally supported plug, an axial elec-' trode supported by the said plug, a collar secured around the opposite'e'nd of the last mentioned tube at the openend of the lamp socket, and means for securing said last mentioned. collar to the lamp socket, all for the purpose described. a I

5.The combination with a lamp socket,

an incandescent bulb having a threaded base,

' the last mentioned tube at the open end of the lamp socket, means for securingsaid last mentioned collar to theila mp socket, said last named means including annular ribs carried by the lamp socket andthe said collar, and a flanged-connecting band or ring extending around the adjacent portions of the lamp socket collar and embracing the said ribs, said band or ring having its ends securely fastened as describecb I g6. The combination with a lamp socket, an incandescent lamp, an extension tube for the lamp socket secured therein and project 7 ing therefrom, central electrodesupported within the said tube, and insulated therefrom,- a collar around the outer end of the said tube, a second tube for engagement at one end within the outer endbfthe first tube, saidsecond tube receiving the lamp base at its opposite end, a collar around the latter end of the second tube, and a clamping screw threaded through the said collar and provided with a tapered threaded inner end to extend into engagement with the lamp base.

7. The combination with a lamp socket, an incandescent lamp, an extension tube for the lamp socket secured therein and projecting therefrom, a central electrode supported within the saidtube, and insulated therefrom, a collar around the outer end of the said tube, a second tube for engagement at one end within the outer end of the first tube, said second tube receiving the lamp base at its opposite end, a collar around the V and provided with a'tapered threaded inner end to extend into engagement with the lamp base, said last mentioned collar having a counter bore at the outer end of its threaded aperture, and said clamping screw having a polygonal head to extend within the counter-bore when the screw is in operative position, for the purpose described.

HOLROYD FITZWILLIAM WAY. 

